You are looking through a microscope at onion cells and you see a cell with the sister chromatids lined up across the middle of the cell. what phase of mitosis are you observing?

What must be true for natural selection to heppen

Which best describes the digestive system of arthropods? a incomplete, two openings b complete, one opening c two-way, one opening d one-way, two openings

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.